package com.waitingresult.collection.list;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;

/**
 * Java 集合的体系结构
 */
public class ListAll {
    public static void main(String[] args) {
        Collection<Object> c = new ArrayList<>();
        HashMap<String, Object> map = new HashMap<>();
        for (int i = 0; i < 10; i++) {
            map.put(""+i,i);
        }
        System.err.println(map);
    }
}
